MPD: thread/Thread.hxx Source File

MPD 0.20.15

Thread.hxx
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1 /*
2 * Copyright 2003-2017 The Music Player Daemon Project
3 * http://www.musicpd.org
4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
9 *
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License along
16 * with this program; if not, write to the Free Software Foundation, Inc.,
17 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
18 */
19
20 #ifndef MPD_THREAD_HXX
21 #define MPD_THREAD_HXX
22
23 #include "check.h"
24 #include "Compiler.h"
25
26 #ifdef _WIN32
27 #include <windows.h>
28 #else
29 #include <pthread.h>
30 #endif
31
32 #include <assert.h>
33
34 class Thread {
35 #ifdef _WIN32
36 HANDLE handle = nullptr;
37 DWORD id;
38 #else
39 pthread_t handle;
40 bool defined = false;
41
42 #ifndef NDEBUG
43
48 bool creating = false;
49 #endif
50 #endif
51
52 void (*f)(void *ctx);
53 void *ctx;
54
55 public:
56 Thread() = default;
57
58 Thread(const Thread &) = delete;
59
60 #ifndef NDEBUG
61 ~Thread() {
62 /* all Thread objects must be destructed manually by calling
63 Join(), to clean up */
64 assert(!IsDefined());
65 }
66 #endif
67
68 bool IsDefined() const {
69 #ifdef _WIN32
70 return handle != nullptr;
71 #else
72 return defined;
73 #endif
74 }
75
79 gcc_pure
80 bool IsInside() const noexcept {
81 #ifdef _WIN32
82 return GetCurrentThreadId() == id;
83 #else
84 #ifdef NDEBUG
85 constexpr bool creating = false;
86 #endif
87 return IsDefined() && (creating ||
88 pthread_equal(pthread_self(), handle));
89 #endif
90 }
91
92 bool Start(void (*f)(void *ctx), void *ctx);
93 void Join();
94
95 private:
96 #ifdef _WIN32
97 static DWORD WINAPI ThreadProc(LPVOID ctx);
98 #else
99 static void *ThreadProc(void *ctx);
100 #endif
101
102 };
103
104 #endif
check.h
Thread::Start
bool Start(void(*f)(void *ctx), void *ctx)
Compiler.h
Thread::~Thread
~Thread()
Definition: Thread.hxx:61
Thread::Join
void Join()
Thread::Thread
Thread()=default
Thread
Definition: Thread.hxx:34
Thread::IsInside
gcc_pure bool IsInside() const noexcept
Check if this thread is the current thread.
Definition: Thread.hxx:80
gcc_pure
#define gcc_pure
Definition: Compiler.h:116
Thread::IsDefined
bool IsDefined() const
Definition: Thread.hxx:68